[lustre-discuss] Limit to the number of "--servicenode="

Andreas Dilger adilger at whamcloud.com
Sat Sep 29 22:49:37 PDT 2018

I haven't checked the code recently, but I believe that there can be up to 32 NIDs assigned per target.  

I've heard of at least some sites that are configuring four OSS nodes per OST, with three OSTs/OSS to allow failover of each OST to a different OSS. That will only increase load on an OSS to 4/3 instead of 2/1 during failover. 

Cheers, Andreas

> On Sep 29, 2018, at 22:27, David Cohen <cdavid at physics.technion.ac.il> wrote:
> Hi,
> In all the manuals and examples there are only two "--servicenode=" in the creation of the mgs nodes and oss. 
> Is that a limitation or can I create more service nodes?
> Is the maximum number of servicenodes is different for mgs and oss?
> David
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